merge_meeting_1.rb

def merge_ranges(meetings) 
  # sort by start times 
  sorted_meetings = meetings.sort 

  # initialize merged_meetings with the earliest meeting 
  merged_meetings = [sorted_meetings[0]] 

  sorted_meetings[1..-1].each do |current_meeting_start, current_meeting_end| 
    last_merged_meeting_start, last_merged_meeting_end = merged_meetings[-1] 

    # if the current and last meetings overlap, use the latest end time 
    if current_meeting_start <= last_merged_meeting_end 
      merged_meetings[-1] = [last_merged_meeting_start, [last_merged_meeting_end, current_meeting_end].max] # add the current meeting since it doesn't overlap 
    else 
      merged_meetings.push([current_meeting_start, current_meeting_end]) 
    end 
  end 
  return merged_meetings
end